Add Workgroup VPN Client

Add Workgroup VPN Client

Hi
I am using Desktop central-7 in our Domain Environment .I need to add our VPN client  to the Desktop Central.
My VPN client is in Workgroup.

I am trying  to add the VPN client Using the Remote office option.I am able to take the assert Details.
But i am not able to install or remove software package.It throw an error "The specified server cannot perform the requested operation."


Kindly please help me on this error.


Regards
Krishna